Angular acceleration, $a$ of a body is given by $($select all that apply$)$

$a=d\frac{}{d}t$

$a={\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}d\frac{}{d}t$

$a=d^2\frac{}{d}{t}^2$

$a=d\frac{}{d}t$